Expenses that are not tax deductible on a federal return fall into a wide set of categories the Internal Revenue Code either excludes by default or blocks outright. The baseline rule is simple: unless a specific provision authorizes a deduction, an expense stays nondeductible, no matter how large or unavoidable it feels. Personal costs almost never qualify, and business expenses must be both ordinary and necessary to your trade.1Internal Revenue Service. Ordinary and Necessary The categories below are the ones taxpayers most often try to claim and can’t.
Personal, Living, and Family Costs
The tax code prohibits deductions for personal, living, or family expenses unless another provision specifically allows them.2Office of the Law Revision Counsel. 26 U.S. Code 262 – Personal, Living, and Family Expenses That one rule sweeps in a lot. Rent, the principal portion of a mortgage payment, utilities, groceries, household supplies, everyday clothing, personal grooming, home repairs on your primary residence, and domestic help are all nondeductible.3eCFR. 26 CFR 1.262-1 – Personal, Living, and Family Expenses Mortgage interest and property taxes may be partly deductible under separate provisions, but the underlying cost of maintaining a household is not.
Funeral and burial costs are another common assumption that doesn’t hold. The IRS does not treat them as qualified medical expenses, and no other section makes them deductible on an individual return. An estate may deduct funeral costs on a federal estate tax return, but if you pay for a loved one’s funeral personally, that money comes from after-tax dollars.
Gym memberships and general fitness spending sit in the same category. The IRS treats fitness as a personal expense because it doesn’t treat, diagnose, or prevent a specific medical condition. A membership prescribed by a physician for a diagnosed condition may qualify for reimbursement through a health savings account, but it still doesn’t produce a line-item deduction.
Commuting to Work
Getting to and from your regular workplace is a personal expense. The IRS does not allow you to deduct commuting costs whether you drive, take transit, or use a rideshare.4Internal Revenue Service. Publication 463 – Travel, Gift, and Car Expenses Working during the commute doesn’t change the answer. Even if you have no regular office, the first trip out and the last trip home count as personal commuting.
Travel between two work locations during the same workday can qualify as a business expense, but the day’s bookends stay nondeductible. If you use the standard mileage rate for business driving, the 2026 rate is 72.5 cents per mile, and you must exclude commuting miles from the total.5Internal Revenue Service. IRS Sets 2026 Business Standard Mileage Rate at 72.5 Cents Per Mile Mileage logs that blend personal commuting with legitimate business trips are a common audit trigger.
Federal Income Tax, FICA, and Capped State Taxes
Federal income taxes, including withholding from your paycheck and any balance paid at filing, are never deductible on your federal return.6Office of the Law Revision Counsel. 26 USC 275 – Certain Taxes The same statute blocks the employee share of Social Security (6.2%) and Medicare (1.45%), estate and gift taxes, and federal excise taxes. Self-employed taxpayers get a partial workaround for the employer-equivalent portion of self-employment tax, but a W-2 employee’s FICA withholding is simply gone.
State and local taxes get a partial deduction, but it’s capped. For 2026, you can deduct up to $40,400 in state and local income, sales, and property taxes combined, with a phase-down for higher incomes that pushes the cap back toward $10,000 for top earners.7Office of the Law Revision Counsel. 26 USC 164 – Taxes Anything above your applicable cap is nondeductible. Gift taxes paid by the donor are also nondeductible; the narrow exception is a gift to a qualified charity.8Internal Revenue Service. Frequently Asked Questions on Gift Taxes
Fines, Penalties, and Illegal-Activity Costs
Any amount paid to a government because you violated or potentially violated a law is nondeductible. That covers traffic tickets, parking fines, building code violations, environmental penalties, and tax penalties such as the 0.5%-per-month failure-to-pay charge.9Office of the Law Revision Counsel. 26 USC 162 – Trade or Business Expenses – Section: (f) Fines, Penalties, and Other Amounts The rule applies even when the penalty arises from business operations.
Narrow exceptions exist. Amounts that a court order or settlement agreement specifically identifies as restitution for harm caused, or as payments made to come into compliance with the law, can be deductible when strict identification requirements are met.10Office of the Law Revision Counsel. 26 USC 162 – Trade or Business Expenses – Section: (f)(2) Exception for Amounts Constituting Restitution The fine itself and the government’s investigation costs remain nondeductible. Bribes and kickbacks are blocked outright.
Political Contributions and Lobbying
Contributions to candidates, parties, PACs, and Super PACs are personal spending that produces no tax benefit. The bar also covers indirect political spending: convention program ads, tickets to fundraising dinners, and inaugural ball admission.11Office of the Law Revision Counsel. 26 USC 276 – Certain Indirect Contributions to Political Parties These are treated differently from donations to 501(c)(3) charities, which are deductible within limits.
Businesses cannot deduct lobbying costs aimed at influencing legislation, participating in political campaigns, swaying the public on legislative matters, or communicating with executive branch officials to affect their positions.12Office of the Law Revision Counsel. 26 USC 162 – Trade or Business Expenses – Section: (e) Denial of Deduction for Certain Lobbying and Political Expenditures A small exception applies to in-house lobbying costs under $2,000 per year, but most businesses with active lobbying efforts exceed that quickly.
Hobby Expenses
If an activity is not carried on for profit, you cannot deduct its expenses. The Tax Cuts and Jobs Act suspended hobby expense deductions from 2018 through 2025, and the One Big Beautiful Bill Act made the elimination permanent starting in 2026. You must report any income a hobby produces but cannot offset it with supplies, equipment, travel, or overhead.
The IRS weighs several factors when deciding whether an activity is a hobby or a business, and one benchmark is whether it produced a profit in at least three of the last five tax years. Failing that test doesn’t automatically make it a hobby, but the burden shifts to you to show a profit motive through evidence such as business plans, time invested, and expertise.
One small carve-out survives. If you sell physical goods through a hobby, you can subtract the cost of goods sold from gross receipts when calculating hobby income, following standard accounting methods and without creating a loss. Anything beyond direct materials cost stays nondeductible.
Cosmetic Surgery
Medical expenses above 7.5% of adjusted gross income are generally deductible, but cosmetic procedures are excluded. The code defines cosmetic surgery as any procedure aimed at improving appearance that does not meaningfully promote proper body function or treat illness.13Office of the Law Revision Counsel. 26 USC 213 – Medical, Dental, Etc., Expenses – Section: (d)(9) Cosmetic Surgery Facelifts, teeth whitening, elective liposuction, and similar procedures fall outside deductible medical care.
The exception is narrow: cosmetic surgery is deductible when it corrects a deformity from a congenital abnormality, an injury from accident or trauma, or a disfiguring disease.14Office of the Law Revision Counsel. 26 USC 213 – Medical, Dental, Etc., Expenses – Section: (d)(9)(A) Reconstructive surgery after a car accident qualifies. Breast reconstruction following a mastectomy qualifies. An elective rhinoplasty does not.
Alimony Under Post-2018 Agreements
For any divorce or separation agreement executed after December 31, 2018, alimony payments are not deductible by the payer and are not taxable income for the recipient.15Internal Revenue Service. Topic No. 452, Alimony and Separate Maintenance The TCJA repealed the alimony deduction for new agreements, and the repeal is now permanent.16Office of the Law Revision Counsel. 26 USC 215 – Repealed
If your divorce was finalized on or before December 31, 2018, the old rules still apply and alimony remains deductible. But if you modify that pre-2019 agreement and the modification expressly states that the new rules apply, you lose the deduction going forward.15Internal Revenue Service. Topic No. 452, Alimony and Separate Maintenance Watch the language during renegotiations closely.
Life Insurance Premiums and Personal Legal Fees
Premiums on a personal life insurance policy where you or your family is the beneficiary are personal expenses. The IRS treats these payments as a form of savings or family protection, not a business or investment cost.3eCFR. 26 CFR 1.262-1 – Personal, Living, and Family Expenses Employer-paid group life insurance up to $50,000 in coverage is a tax-free fringe benefit, which is a different situation from premiums you pay yourself.
Legal fees for personal matters are also nondeductible. Divorce, child custody, personal injury suits you initiate, estate planning, and personal disputes all count as personal expenditures under the same broad rule.2Office of the Law Revision Counsel. 26 U.S. Code 262 – Personal, Living, and Family Expenses Before 2018, certain personal legal fees tied to producing taxable income (for example, fees to collect alimony) could be claimed as a miscellaneous itemized deduction. That door is now permanently closed.
Investment Fees, Tax Prep, and Unreimbursed Employee Costs
A whole category of expenses that used to be partly deductible has been wiped out. Miscellaneous itemized deductions subject to the old 2%-of-AGI floor are permanently nondeductible for individual taxpayers starting in 2026. The list includes:
- Investment advisory and management fees, whether flat or a percentage of assets.
- Tax preparation costs paid to a CPA, enrolled agent, or software company for your personal return.
- Safe deposit box rental, even when the box holds income-producing documents.
- Unreimbursed employee expenses, including uniforms, tools, work travel beyond commuting, professional dues, and continuing education for W-2 employees.
The uniform point trips people up. Employees used to deduct the cost of specialized clothing not suitable for everyday wear, such as safety gear or required uniforms. That deduction no longer exists for W-2 employees. Self-employed individuals can still write off work-specific clothing and protective equipment as a business expense.
If you’re a high-net-worth taxpayer paying significant investment advisory or legal fees, some strategies involving trusts or business entities may preserve partial deductibility. That’s a conversation for a tax professional, not a workaround you build yourself.
Education Costs That Don’t Qualify
Private school tuition for kindergarten through 12th grade is not deductible on a federal return. Some states offer credits or deductions through their own programs, and 529 plan distributions can cover up to $10,000 per year in K-12 tuition tax-free, but no federal deduction applies. The narrow exception involves a child attending a specialized private school on a physician’s referral for a specific medical condition, where tuition may qualify as a deductible medical expense.
Student loan principal payments are another common misconception. The interest portion of student loan payments is deductible up to $2,500 per year for qualifying taxpayers, but principal repayment is simply returning borrowed money and produces no deduction. Wages paid to household employees like nannies are also nondeductible personal expenses, though the child and dependent care credit may offset some of the cost through a different mechanism.
Personal Casualty and Theft Losses
Personal casualty and theft losses, such as damage from a fire, storm, or burglary, are generally nondeductible unless the loss results from a federally declared disaster.17Internal Revenue Service. Topic No. 515, Casualty, Disaster, and Theft Losses Before 2018, you could deduct personal casualty losses that exceeded $100 per event and 10% of AGI. The TCJA suspended that broader deduction and it has since been made permanent. If a tree falls on your car or your home is burglarized outside a declared disaster zone, the financial hit is entirely yours to absorb. Business property losses and losses within federally declared disasters follow their own, more favorable rules.